Sulphurized indophenols



7 Patented July 2, 1935 sULP HU QziiDQmDoPHENoLs Paul 'sehiek and Heiiii'ihh Lauth, Frankfort-on the-Main Feclienhiiir;.Germany, assignors to General Aniline Works, Ine New York, N Y., a

corporationof Delaware Q No Dra\vin g ;.i Application De'cemb'er-'11;. 1 9'33;- 1. r Serial No. 70134-2. In GermanmDecember 29, j 7 -q Our invention relates to new violet sulphur dyestuffs and a process formaking samfew In accordance our inventionvaluable violet sulphur dyestuffs are obtained by treating 5' with a sulphurizing agent, according to them eth 0d customary for. the manufacture of sulphur dyestuffs, an indophenol, (or the corresponding leuco-indophenol) of thetype; 1 I

in which X represents" hydrogen or halogen,,Ac an acyl-radicle of the aliphatic or aromatic series and R hydrogen or an alkyl group, which compound is obtainable for example by jQiIit oxi dation of a 1-acylamino-2A-diami'no (or 2-aminoi-dialkyl-ainino) -benzene and p-aminophenol or a halogenated substitution product thereof. I

The new dyestuffs dyevegetable fibers 'fromthe Sodium sul e t in iew? Shades 9t l dfastness to washing,boiling acids and light.

In order to further illustrate our'invention the following examples are given, the parts being by weight and all temperatures, in 'centigrade degrees but we wish it, however,,to be understood that our invention is not limited to" the particular conditions or specific products mentioned ther'ein;' I

parts of the indophenol of the formula: 352,; r V I| lHz I IHCOCHZ 40 obtained for example by joint oxidation with .air

of one molecular proportion of ZA-diamino-l acetanilideand one molecular proportion of paminophenol in an aqueous solution are poured while stirring at about C. into a polysulphide solution prepared from 150 parts of crystallized sodium sulphide and 55 parts of sulphur, whereby solution and reductiontake place. The solution is then evaporated until it exhibits a boiling point of IDS-109 C. and boiled for about 20 hours under reflux. The dyestufi formed may be isolated in the usual manner for instance by blowing in air into the diluted fusion mass or by adding common salt thereto or by precipitating it with an acid. Advantageously the separated subsequent reduction by means of sodium sul-f' phidea 're poured mtea @eiysm mae solution pre spa ed. i

- mixture boiled 2under at ab0ut1 1'08 I -siin ilarin itslpro erties to, that; of Exampl ljisfl in Example 2 with 2,6-dichloro-4aminophenol ,with formation vof the leucoindophenol of the formula:

dyestufi is subjected to an oxidizing aftertreatous suspension in the presence offalkali hydroxide. The dyestufi dyes the vegetable fiber from the sodium sulphide bath violet shades.

. Y ,7 Ex m e? pa e of the recommend of the formulai obtained br e. it ioi'ii'of eqiu'meieeuisr' pr p rpiefiaerzaealem amateur emerb- -aminaehenoi iii alwe r ammonia s61" tion by means ermengaaese peroxide and by isp' teas r eiyjstamzea euium $111; 7 3 pa ts of sulphur. While 't'ir'ri'ng the.v

reflux forfabo'ut 20 hoii' phide a isolated asd'eseribea in the foregoing 3 temple 3 v 2,4-diamino="l 1iropionic acid-anilide of:124 to 125 C. melting point are condensed as described o1 NH-ooomom 53 parts thereof are poured into a polysulphide solutionprepared from parts of crystallized sodium sulphide and 75 parts of sulphur. 'The mass is boiled. under reflux at 10? to 108 C; for about 18 hours. The dyestufi is isolated as described in Example 1. It is very similar with those of theforegoing examples.

v Ewwmplie 4 V 30 parts of the indophenol of the formula:

I NHz NH-OO CuHli obtained by condensing one molecular proportion of 2,4l-diamino-1-benzoic acid anilide-mono-hyand 2,6-d

Example 5' nitrocompound, and 22 parts of p-amino-phenol are oxidized in an hydrochloric acid solution with sodium bichromate. The indophenol thus formed of the formula:

Q tallized sodium sulphide and 110 partsot sulphur.

The mass is evaporated until it exhibits a boiling point of 108 to 109 C. and then boiled for about 24 hours in an apparatus providedwith a stirrer and reflux condenser. The dyestufl'which is iso- .;1late i asdescribed in Example l'dyes the vegemllamino-acetanilide of 112 .C; melting pointyobtained by nitrating l-diethylam ino-acetanilide a sulphurizing agent according to the method table fiber from a sodium sulphide bath violet shades. I v

-A similar violet dyeing dyestuflf is obtained when condensing 144'parts-of 2- amino#4-diethyland reducing the formed nitrocompound of 89 C. melting point, with 22 parts of p-aminophenol and sulphurizing the formed indophenol of the v dormula:

IU bM as described'in the'foregoing examples.- H n We claim: r

l. Sulphur dyestuffs obtained by treating with customary for the manufacture oisulphur" dyestuffs, a compound selected from the group eonsisting of indophenols and leuco indophenols of the formula:

i f X NH-Ac in which X represents hydrogen or halogen, Ac an acyl radicle of the aliphatic or aromatic series and R hydrogen or an alkyl-group, which dye- H r V s tufis dye vegetable fibers from the sodium sul- 40 parts of m m m :j phide bath violet shades of good fastness to lide of 147 C. melting point, obtained by nitrat ing 4-dimethylamino-acetanilide and reducing the.

NHz

which dyestuil dyes vegetable fibers from the sodium sulphide-bath violet shades of good fastness to washing,boiling acids and light.

3. A sulphur dyestuif, obtained'by t'reating'with a sulphurizing agent according to the method customary for the manufacture of sulphur dyestuffs, the leucoindophenol of'the formula:

- or NHJ" 01 NHCOCH: I

a sulphuri zing agent according to the niethod .which dyestufi dyes vegetable fibers from r the sodium sulphide bath violet shades of'good fast- ;ness to washing, boiling acids and light.

4. A sulphur dyestufi, obtained by treating with t cu'stornary'for the manufacture of sulphur dyei stuffs, the indophenol of the formula;

NH-COCHa V which dyestuti dyes vegetable fibers from the; sodium sulphide bath violet shades of good fast- -ness to washing, boiling acids and light.

PAUL SCHICK.

HEINRICH LAUTH 

